module.exports = extMap = {
  // 默认
  '': 'text/plain',
  '3gp': 'video/3gpp',
  a: 'application/octet-stream',
  ai: 'application/postscript',
  aif: 'audio/x-aiff',
  aiff: 'audio/x-aiff',
  asc: 'application/pgp-signature',
  asf: 'video/x-ms-asf',
  asm: 'text/x-asm',
  asx: 'video/x-ms-asf',
  atom: 'application/atom+xml',
  au: 'audio/basic',
  avi: 'video/x-msvideo',
  bat: 'application/x-msdownload',
  bin: 'application/octet-stream',
  bmp: 'image/bmp',
  bz2: 'application/x-bzip2',
  c: 'text/x-c',
  cab: 'application/vnd.ms-cab-compressed',
  cc: 'text/x-c',
  chm: 'application/vnd.ms-htmlhelp',
  class: 'application/octet-stream',
  com: 'application/x-msdownload',
  conf: 'text/plain',
  cpp: 'text/x-c',
  crt: 'application/x-x509-ca-cert',
  css: 'text/css',
  csv: 'text/csv',
  cxx: 'text/x-c',
  deb: 'application/x-debian-package',
  der: 'application/x-x509-ca-cert',
  diff: 'text/x-diff',
  djv: 'image/vnd.djvu',
  djvu: 'image/vnd.djvu',
  dll: 'application/x-msdownload',
  dmg: 'application/octet-stream',
  doc: 'application/msword',
  docx: 'application/msword',
  dot: 'application/msword',
  dtd: 'application/xml-dtd',
  dvi: 'application/x-dvi',
  ear: 'application/java-archive',
  eml: 'message/rfc822',
  eps: 'application/postscript',
  exe: 'application/x-msdownload',
  f: 'text/x-fortran',
  f77: 'text/x-fortran',
  f90: 'text/x-fortran',
  flv: 'video/x-flv',
  for: 'text/x-fortran',
  gem: 'application/octet-stream',
  gemspec: 'text/x-script.ruby',
  gif: 'image/gif',
  gz: 'application/x-gzip',
  h: 'text/x-c',
  hh: 'text/x-c',
  htm: 'text/html',
  html: 'text/html',
  ico: 'image/vnd.microsoft.icon',
  ics: 'text/calendar',
  ifb: 'text/calendar',
  iso: 'application/octet-stream',
  jar: 'application/java-archive',
  java: 'text/x-java-source',
  jnlp: 'application/x-java-jnlp-file',
  jpeg: 'image/jpeg',
  jpg: 'image/jpeg',
  js: 'application/javascript',
  json: 'application/json',
  log: 'text/plain',
  m3u: 'audio/x-mpegurl',
  m4v: 'video/mp4',
  man: 'text/troff',
  mathml: 'application/mathml+xml',
  mbox: 'application/mbox',
  md: 'text/markdown',
  mdoc: 'text/troff',
  me: 'text/troff',
  mid: 'audio/midi',
  midi: 'audio/midi',
  mime: 'message/rfc822',
  mml: 'application/mathml+xml',
  mng: 'video/x-mng',
  mov: 'video/quicktime',
  mp3: 'audio/mpeg',
  mp4: 'video/mp4',
  mp4v: 'video/mp4',
  mpeg: 'video/mpeg',
  mpg: 'video/mpeg',
  ms: 'text/troff',
  msi: 'application/x-msdownload',
  odp: 'application/vnd.oasis.opendocument.presentation',
  ods: 'application/vnd.oasis.opendocument.spreadsheet',
  odt: 'application/vnd.oasis.opendocument.text',
  ogg: 'application/ogg',
  p: 'text/x-pascal',
  pas: 'text/x-pascal',
  pbm: 'image/x-portable-bitmap',
  pdf: 'application/pdf',
  pem: 'application/x-x509-ca-cert',
  pgm: 'image/x-portable-graymap',
  pgp: 'application/pgp-encrypted',
  pkg: 'application/octet-stream',
  pl: 'text/x-script.perl',
  pm: 'text/x-script.perl-module',
  png: 'image/png',
  pnm: 'image/x-portable-anymap',
  ppm: 'image/x-portable-pixmap',
  pps: 'application/vnd.ms-powerpoint',
  ppt: 'application/vnd.ms-powerpoint',
  ps: 'application/postscript',
  psd: 'image/vnd.adobe.photoshop',
  py: 'text/x-script.python',
  qt: 'video/quicktime',
  ra: 'audio/x-pn-realaudio',
  rake: 'text/x-script.ruby',
  ram: 'audio/x-pn-realaudio',
  rar: 'application/x-rar-compressed',
  rb: 'text/x-script.ruby',
  rdf: 'application/rdf+xml',
  roff: 'text/troff',
  rpm: 'application/x-redhat-package-manager',
  rss: 'application/rss+xml',
  rtf: 'application/rtf',
  ru: 'text/x-script.ruby',
  s: 'text/x-asm',
  sgm: 'text/sgml',
  sgml: 'text/sgml',
  sh: 'application/x-sh',
  sig: 'application/pgp-signature',
  snd: 'audio/basic',
  so: 'application/octet-stream',
  svg: 'image/svg+xml',
  svgz: 'image/svg+xml',
  swf: 'application/x-shockwave-flash',
  t: 'text/troff',
  tar: 'application/x-tar',
  tbz: 'application/x-bzip-compressed-tar',
  tcl: 'application/x-tcl',
  tex: 'application/x-tex',
  texi: 'application/x-texinfo',
  texinfo: 'application/x-texinfo',
  text: 'text/plain',
  tif: 'image/tiff',
  tiff: 'image/tiff',
  torrent: 'application/x-bittorrent',
  tr: 'text/troff',
  txt: 'text/plain',
  vcf: 'text/x-vcard',
  vcs: 'text/x-vcalendar',
  vrml: 'model/vrml',
  war: 'application/java-archive',
  wav: 'audio/x-wav',
  wma: 'audio/x-ms-wma',
  wmv: 'video/x-ms-wmv',
  wmx: 'video/x-ms-wmx',
  wrl: 'model/vrml',
  wsdl: 'application/wsdl+xml',
  xbm: 'image/x-xbitmap',
  xhtml: 'application/xhtml+xml',
  xls: 'application/vnd.ms-excel',
  xml: 'application/xml',
  xpm: 'image/x-xpixmap',
  xsl: 'application/xml',
  xslt: 'application/xslt+xml',
  yaml: 'text/yaml',
  yml: 'text/yaml',
  zip: 'application/zip'
}
